I've found an interesting video. In the 20 minutes this video lasts Jeff Hawkins presents his theory of intelligence, which is very interesting in my opinion. I think, Jeff Hawkins might have discovered one very important piece in the puzzle of understanding the human brain.
If you are interested further in this topic you may want to read the book "On Intelligence" by Jeff Hawkins. I did not do this, yet, but I will surely do so in the future. There is also a website belonging to this book: www.onintelligence.org